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A Cu

Shuping Wang1, Lumiao Wu1, He Li1

  • 1College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165, People's Republic of China.

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|June 9, 2023
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Summary
This summary is machine-generated.

Researchers explored rhodamine B hydrazide hydrazone (RhBHH) derivatives, discovering that halogen substituents significantly influence Cu2+-triggered photochromic properties. This finding opens new avenues for advanced photochromic materials and security applications.

Keywords:
Cu2+ triggerinformation storagephotochromicstructure photochromic response relationship

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Area of Science:

  • Organic Chemistry
  • Materials Science
  • Photochemistry

Background:

  • Rhodamine B hydrazide hydrazone (RhBHH) derivatives are known for their photochromic properties.
  • Understanding the structure-property relationship is crucial for designing novel photochromic materials.
  • Previous studies suggested limited influence of certain substituents on RhBHH photochromism.

Purpose of the Study:

  • To investigate the structure-photochromic response relationship (SPRR) of novel RhBHH derivatives.
  • To explore the effect of various substituent groups, particularly halogens, on Cu2+-triggered photochromism.
  • To evaluate the potential applications of these new photochromic systems.

Main Methods:

  • Synthesis of fifteen RhBHH derivatives (compounds a-o) with diverse substituent groups.
  • Systematic study of their photochromic properties triggered by Cu2+ ions.
  • Detailed characterization of photochromic behavior using compound g as a model.

Main Results:

  • Three derivatives (f-h) with para-hydroxyl and meta-halogen substituents exhibited significant Cu2+-triggered photochromism, differing from prior reports.
  • Halogen atoms were found to exert a considerable influence on the photochromic behavior of RhBHH derivatives.
  • Compound g demonstrated high selectivity for Cu2+ as a trigger, with good reversibility upon visible light irradiation and dark/heat bleaching.

Conclusions:

  • Halogen substituents play a critical role in tuning the photochromic response of RhBHH derivatives.
  • The developed photochromic system shows potential for applications in photochromic glass, security inks, and data storage.
  • This study provides valuable insights into the SPRR for designing advanced photochromic materials.